Skyjack SJ61T - 31 No Boom up from Platform Control Console; 32 No Boom down from Platform Control Console

Telescopic Boom Series
Models SJ61T & SJ66T
194312
December 2007 Page 127
Section 4 - Troubleshooting Information Service and Maintenance
16. Loose or broken wire #20D from platform terminal block to relay 08CR1.
- Check continuity. Replace if defective.
17. Loose or broken wire #20 from 08CR1 relay to plug A pin #8 in platform control console.
- Check continuity. Replace if defective.
18. Defective relay 08CR1.
- Check relay. Replace if defective.
4.1-31 No Boom Up From Platform Control Console
1. Loose or broken wire #04 from platform terminal block to joystick controller A1.
- Check continuity. Replace if defective.
2. Loose or broken wire #02 from platform terminal block to joystick controller A1.
- Check continuity. Replace if defective.
3. No output on y-axis of joystick controller A1.
- Refer to joystick test procedure in section 5.
4. Loose or broken wire “Y" from joystick controller A1 to valve driver pin #29.
- Check continuity. Replace if defective.
5. No output on pin #5 of the valve driver to wire #20B.
- Check pin #5 for 12 volts. If no voltage present with foot on footswitch check section 5 for
OCM pin voltage reference.
6. No output on pin #22 of the valve driver to wire #14.
- Check pin #22 for minimum 3.5 volts. If no voltage present with foot on footswitch check section
5 for OCM pin voltage reference.
7. Loose or broken wire #14 from valve driver pin #22 to plug A pin #7 in platform control console.
- Check continuity. Replace if defective.
8. Loose or broken wire #14 in boom cable A or its connectors.
- Check for continuity between pins #7 on cable A. Check for loose or corroded connections on
cable connectors. Replace if wire is defective.
9. Loose or broken wire #14 from base connector plug A pin #7 to base terminal block.
- Check continuity. Replace if defective.
10. Loose broken wire #14 from base terminal block to turret harness plug pin #4.
- Check continuity. Replace if defective.
11. Loose or broken wire #14 from turret harness plug pin #4 to boom up valve 4H-14.
- Check continuity. Replace if defective.
12. Loose or broken wire #02 from turret harness plug to boom up valve 4H-14.
- Check continuity. Replace if defective.
13. Defective boom up valve coil 4H-14.
- Check continuity and resistance through coil. Replace if defective.
-
4.1-32 No Boom Down From Platform Control Console
1. Loose or broken wire #04 from platform terminal block to joystick controller A1.
- Check continuity. Replace if defective.
2. Loose or broken wire #02 from platform terminal block to joystick controller A1.
- Check continuity. Replace if defective.
3. No output on y-axis of joystick controller A1.
- Refer to joystick test procedure in section 5.
4. Loose or broken wire “Y" from joystick controller A1 to valve driver pin #29.
- Check continuity. Replace if defective.
5. No output on pin #5 of the valve driver to wire #20B.
- Check pin #5 for 12 volts. If no voltage present with foot on footswitch check section 5 for
OCM pin voltage reference.